200812435 九、發明說明： 【發明所屬之技術領域】 本發明係將D _並聯共振絲絲電子錢ϋ與兩έ且降 升壓式功因改善電路整合成單—級，並共用主動切換開關，以減 少控制電路與元件數，且將電路之絲咖操作於零電壓盥 零電流切解通航，_少_元件場敎以_高效率的 【先前技術】 電子安定器大多是採用舰式換流器為主要的電路架構，以 功率半導體元件為_，作高頻的切換動作，提供螢光燈負載所 需的高頻電源。D類串並聯碰式螢絲電子安定器具有結· 早、效率高、適合高頻操作、共振電流接近正錢及燈管電流峰 值因數較低等優點，因而被大錄電子安定器採用。d類串並聯共 振式螢光燈電子安定器可採自激或外激之_方式來切換其主動 開關’自激式擷取負載電流回授自行產生驅動信號，不需額外控 制電路，成本較低。然而，自激式電子安定器自有其先天上的^ 制’不容紐到高功因、調光、預熱控制等功能。 圖1所示’為一般市面上所最常見的半橋結構之D類串並聯共 振式螢光燈電子安定H驅動營光燈的電路結構。主要_兩組錢 ^源提供能量給D類串並聯共振式螢光燈電子安定器，然後串並聯 共振式電子安定器再做高頻切換來驅動螢光燈負載，該電路負載是 由兩支串聯的螢光燈管所構成’ φ聯共振部分由電感Ls與電容 CS所組成，並聯共振部分包含電容Cp、Cfl與Cf2，其中燈絲電 200812435 流只通過Cfl與CG。理論上，兩個開關元件S1與S2具有相同 的導通時間’因此共振電路的輸入電壓不存在直流成分，但由於 元件上的差賊考量魏參數賴化，纽齡材能存在於丘 振電路中，需要電容Cs _除·電路巾所存在的歧 成分。 利用兩組半波整流電路可以提供圖丨所需的直流電壓源，若在 半波整流·後方再加上兩_升駐轉翻，配合適當得承路 參數設計與絲關元件切換時間㈣，補可以提供穩定:直 流電壓源，並且也將具有功因修正的效果，如圖2所示。圖2中 有兩組降升壓式轉換H，其中的降升壓式轉換器丨經由整流二極 體D3將交流輸入電源的正半波轉換成直流電壓；降升壓式轉換器 '1經由整流二極體D4將交流輸人電源的負半波轉換成直流; 壓，此雙級的安定H需要兩组控制電路，分別控制兩組降升壓 轉換器與D類串並聯共振式換流器，且主動_的數目多達四個， 這種雙_賴需要时辨賴的雜，增加切鋪失和額外 的傳導損失，使得整體的電路效率降低；而且，需要兩組控制電 路分別鶴功因修正電路與共振式換流器。額外增加的控制電路 和切換讀餅結顯雜，縣也姆提冑。. 成本敏感的f子蚊“言，並獨於其產品的料競爭力。、 【發明内容】 本發明之主要目的係錢供—具有魏構造簡單、控制容 易、可提高鱗贿低成本之螢絲電子安定器。 歷轉2，月在:動滤波器之輸出端並接兩組降升 ^組中各設有一主動開關、儲能電感與直流鏈電 6 200812435 =所組成·’且利用每-組降升壓轉換器中之主動開關與直流鍵電 谷與共振電路形成-D辦並聯共振錢紐電子安定器。 【實施方式】 有關本發明為達上述之制目的及姐，所_之技術手段，茲 舉出較佳可行之實施例，並配合圖式所示，詳加說明如下：200812435 IX. Description of the invention: [Technical field of the invention] The present invention integrates a D_parallel resonance wire electronic money cassette with a two-turn and step-down power-effect improving circuit into a single-stage, and shares an active switching switch. In order to reduce the number of control circuits and components, and to operate the circuit of the wire coffee to zero voltage 盥 zero current cut-off navigation, _ less _ component field _ high efficiency [prior art] electronic ballast is mostly using ship commutation The main circuit architecture, with power semiconductor components as _, for high-frequency switching action, provides the high-frequency power required for the fluorescent lamp load. The D-type series-parallel-impact filament electronic ballast has the advantages of early junction, high efficiency, suitable for high-frequency operation, resonant current close to positive money, and low peak current factor of the lamp, so it is adopted by the Dalu electronic ballast. The d-type series-parallel resonant fluorescent lamp electronic ballast can be self-excited or externally excited to switch its active switch' self-excited load current feedback feedback signal, without additional control circuit, cost low. However, the self-excited electronic ballast has its own innate control system, high power factor, dimming, warm-up control and other functions. Figure 1 shows the circuit structure of the electronically stabilized H-driven camplight lamp of the D-type series-parallel resonant fluorescent lamp, which is the most common half-bridge structure on the market. The main _ two groups of money source provides energy to the class D series-parallel resonant fluorescent lamp electronic ballast, then the series-parallel resonant electronic ballast and then high-frequency switching to drive the fluorescent lamp load, the circuit load is two The series of fluorescent tubes constitute the 'φ coupling resonance part consisting of the inductance Ls and the capacitance CS. The parallel resonance part contains the capacitances Cp, Cfl and Cf2, wherein the filament electric current 200812435 flows only through Cfl and CG. In theory, the two switching elements S1 and S2 have the same on-time “There is no DC component in the input voltage of the resonant circuit, but due to the difference in the component, the New Zealand material can exist in the Qiuzhen circuit. It is necessary to have a capacitance Cs _ div. The two sets of half-wave rectification circuits can be used to provide the DC voltage source required for the map. If the two-wave rectification is followed by two _liters, the appropriate design of the bearing parameters and the switching time of the wire-off components (4) are used. The compensation can provide stability: DC voltage source, and will also have the effect of power factor correction, as shown in Figure 2. In Fig. 2, there are two sets of step-down converters H, wherein the step-down converter 转换 converts the positive half wave of the AC input power source into a DC voltage via the rectifying diode D3; the step-down converter '1 via The rectifier diode D4 converts the negative half wave of the AC input power into DC; the voltage, the two-stage stability H requires two sets of control circuits to control the two sets of step-down converters and the D-type series-parallel resonant converter And the number of active _ is up to four, this kind of double _ depends on the need to identify the miscellaneous, increase the cut loss and additional conduction loss, so that the overall circuit efficiency is reduced; moreover, two sets of control circuits are required respectively Power factor correction circuit and resonant converter. The additional control circuit and the switching of the reading cake are mixed, and the county is also awkward. Cost-sensitive f-mosquito "speaks and is unique to the competitiveness of its products." [Summary of the Invention] The main purpose of the present invention is to provide money with a simple structure, easy control, and improved low-cost fire. Wire electronic ballast. The calendar is 2, month: at the output end of the dynamic filter and connected to the two groups of rise and fall groups, each with an active switch, energy storage inductor and DC link power 6 200812435 = composed · 'and use each - The active switch in the group-down boost converter and the DC-key electric valley and the resonant circuit form a D-parallel resonance Qiannan electronic ballast. [Embodiment] The present invention relates to the above-mentioned system and the sister, the The technical means, which are preferred and feasible examples, are shown in the following figure:
本發明係保存降升壓式轉換贿D類共振触器晴性與優點， 率先提出單級高功因D類串並聯共振式魏燈電子安定器，電路結構 是整合兩組降升壓轉換!i丨、Π與D類共振換流器。整合的過歧合 併圖2中的開關&與開關心；開關&與開關心，並重新安排電感^、 心2、一極體仏和认位置，得到圖3之單級高功因D類串並聯共振式 螢光燈毛子女疋器，整合後的電路只需要一組控制電路及兩個主動開 關’控制電路採舰波寬度調變的控财式，顧定主細關的切換 頻率與責任週期。由於兩組降升壓式轉換器的儲能電感分別負責輸入 電源的半個週期，不會同時有電流流過，因此，實際電路是利用一個 鐵心和兩組繞線來製作電感Zp/7與Z成。功率開關元件&及&為雙向 導通開關，可以使用MOSFET，其基底-汲極間的二極體可用來作為 A和认’毋需額外並聯二極體。因此，與其它單級高功因螢光燈電子 安定裔電路相比較[41-43]，本研究計畫所提出的單級D類串並聯共振 式高功因螢光燈電子安定器電路中的二極體數目很顯然地大為減少 了，其中減少的二極體，部分是快速二極體。所以，將使得本研究計 畫的電路在成本上更具有競爭力。另外，電路中的被動濾波器G 以及電谷C/是用來消除轉換器的高頻電流成份，使輸入電流呈低頻 (60Hz)的正弦波。 為了證實整合後的新型單級高功因D類串並聯共振式螢光燈電子 安定器的可行性，本專利將以兩支串聯的40W螢光燈為設計實例，分 7 200812435 H的操作原理與工作模式，利絲本波分析法推導電路方程式， 认路中的各項參數，使兩組降升壓轉換器輯作於不連續電流導 2式’而將！）類串並聯共振式螢光燈電子安定器設計於零電壓與零 •切換導通操作情況下，以達到高功因、低触、低切換損失 效率的目標。 〃 =3的單級高功因D類串並聯共振式螢光燈電子安定器具有對稱 性的電路結構’開關&必須有相同的工作週期，因此，必須採用 ^冉脈波見㈣變來控制主動關⑦、&，主動__發信號如圖 4所不，厂㈣、F賊為開關的閘極電壓，其脈波寬度相等且互補， ·έ……為s遲㈣’在怠遲時間•内^均為低電位，當急遲時 間增加時，脈波寬度減少，怠遲時間不能為零，以防止主動開關. 仏同時導通。圖中&為心、&的責任週期，定義為脈波寬度與工作 週期的比值。 、，女疋杰電路結構與控制電路為對稱性，對於輪入電源而言，其正 半週與負半週的工作模式相似，不同的只是導通元件改變，當輸入電 源正半週時，降升雖觀〗玉作，將輸人交流電源讎成直流電源 匕/2，同時間，降升壓轉換器n不工作；反之，當輸入電源負半週時， 降升壓轉換H II J1作，將輸人交流電雜触直流電源^^，而降升 壓轉換器I不工作。為簡化分析，本文只針對正半波電源作分析，並 忽略被動濾波電路4、cw，它用來濾除轉換器的高頻成分，不影響轉 換器動作。 為了達到功因修正的目的，降升壓轉換器必須工作在不連續電流 模式，在此一條件下，根據功率開關元件的導通狀態，在一個高頻的 週期内，電路可區分為五個工作模式，如圖5所示。圖6顯示在各工 作模式下的電壓及的電流理論波形，其中，圖6(a)顯示輸入電壓為正 半週時的波形；圖6(b)顯示輸入電壓為負半週時的波形。 8 200812435 工作模式I開始於閘極訊號Γ㈣由高電位變為低電位的瞬間，込 關’經職暫聽遲時·，峨b由低t據為高電位，2 G並未立叫通，_共振電路成電雜，共振電以落後電堡，在 &關閉瞬間，/,為負值並流向二極體A，—旦A導通，兩端電壓 幾乎為零(·0.7ν) ’整流後的輸人電壓跨在Zp/上，降升壓轉換器工作於 DCM ’電感電流從零開始線性增加，心增加的速度與輸入電壓成 正比’當心與/,的和大於零時，二極體D/截止，進入工作模式灯。 二、工作模式 11(〇 <α<α2): /導通’部分/ρ流過込，剩餘部分流經共振電路，g保持在導通 狀悲’ &兩端電壓仍然等於整流後的輸入電壓，心繼續線性增加， 心由負漸漸增加至正值，之後，&與Λ共同流過〜由於⑽^導通 時電壓、電流都等於零’具有零電壓及零電流切換導通優點，切換損 失很小。當間極糕^轉為低準位時，開關 達 峰值，進入碎赋m。 心到達 一、工作模式 ΙΙΙ(ί2 <ί<ί3) ·· 進入工作模式III的_，_㈣止，Λ為正值 3換到二極料，對C2充電，為了使轉換器工胁DCM ·、( rf/ )必不又计大於輸入交流電壓的峰值，使A為逆向偏壓 不2過輸入電源，而是流經A對G充電，心兩端電屋為負& ϋ) ’ /滅峰_始雜獨。由於；鱗值與輸人麵成正比關 y，*此，心可能比Λ晚下降至零；也可能比Λ早下降至跫， ===時，進人工作模式1v-a;後者，當&下降至零時，進入 '式III時，/，為正且流經A，必兩端電壓等於二極體導通電 200812435 壓(-0.7V)，幾乎為零，經過短暫的怠遲時間後，閘級訊號厂辦由低電 位變為咼電位，然而，0並未立即導通，迨厶經過零點變負時，^切 換導通，如同込，込具有零電壓及零電流切換導通優點，切換損失很 四、工作模式IV-a(〇 <，<，4): 厶流經過込，心繼續下降，對於不連續電流的工作模式，在閘級 訊號F㈣變為低電位之前，電感電流心遞減到零，此時，進入工作模 式V。 、 立、丄TF核式 IV_b (,3 < ^ < (4): 在此工作模式下，^為零，乃3截止；Λ為正且流經D2，當厶經過 零點變負時，仏切換導通，進入工作模式V。 六、工作模式V(纟4 <〖<ί5): 在此工作模式下^導通4流經込，電容Q提供能量給共振電路， 當厂滅由高電位變為低電位瞬間，込截止，電路進入下一高頻週期的 工作模式I。 由於A和和必)導通時間的和等於切換週期的一平，亦即， &、&的工作責任週期均等於〇·5，控制降升壓轉換器工作於非連續電 流模式，且在每一輸入電源週期内，使開關切換頻率久保持固定，則 輸入電流可以追隨輸人輕波形且同她，如此可以軸高功率因 數。所以整流1輸人糕&的峰值會追隨輸人輕波形，圖7為淚波 前的輸入電流厶示意波形。 ° ' 當儲能電感的電壓對時間的積分小於零時，降升壓轉換器工作於 非連續電流㈣，若是降升壓雜器能於輸人賴峰辦，能操作於 不連續電流導賴式，射確保讀人電_每—雜佩必定都能 200812435 工作於不連續電料通赋，因此，直麟賴^^/2必需大於輸入恭 壓的蜂值。 ’^ 圖8為輸入電壓Vs與輸入電流4波形，輸入電流非常接近正弦波 且/、輸入电壓同相，安定器效率為9〇%，·功率因數為〇·99 ;輸入電流 的總谐波失真為8.0%。Η 9為兩組降升壓轉換器的電感電流波形，當 輸入電壓正半麟，只有降升壓轉換器〗有電流通過，當輸入電壓負 半波時、有降升壓賴H Π有電流通過，電感電流在整 内’均操作料賴t料通赋。 帝圖10顯示燈管電壓、及燈管電流‘的波形，燈管電麼與電弧 二幾乎同相，燈管呈現電阻性；燈管電流的峰值因數等於1.34。圖 11顯不4、心、u人在輸入電壓於正半波峰值，零點附近與負半 波峰2的波形，量驗形與理論推導波形非常—致。&與&均開始 於負電流，此負電流電流流過主動開關旁的並聯二極體⑼如，主動 開關兩端龍鱗，絲示絲_ G與⑦確實可轉切換導 〉ϋ ?顯7F長_的與A波形’從圖中亦可發現，兩 :=壓轉換H工作於不連續電流導賴式，且分別 正、負半週工作。 紅上所述，本發明所提出的單級高功因D類串並聯共振式蝥光燈 電子较H單級高_螢光燈電子安定器、，不但具有電路構造簡單、 控制4及紐率與低成本等優點。經由實際測量結果顯示此單級高 功因的電子錢體電路效率高達_ ;輸人電源的功相數也高 達0·99，而輸人電流的總财失真為8 〇%。 【圖式簡單說明】 第圖D類串並聯共振式換流器瑩光燈電子安定器。 11 200812435 第一圖雙級而功因D類串並聯共振式螢光燈電子安定器電路架 構。 第三圖單級高功因D類串並聯共振式螢光燈電子安定器。 第四圖主動開關觸發信號對稱脈波寬度調變。 第五圖工作模式Ι、ΙΙ、ΙΠ、IV_a、IV_b、V。 弟六圖理論波形。 第七圖jp示意波形。 第八圖輸入電壓6與輸入電流波形。 第九圖降升壓式轉換器電流/p/與/p2波形。 第十圖燈管電壓與燈管電流/flrc波形。 第十一圖^6、/r、/57與/幻波形。 第十二圖長時間量測的匕&、心、心與心波形。 【主要元件符號說明】 濾、波器 f 降升壓式轉換器I、π D類串並聯共振式換流器螢光燈電子安定器 電感A、乙、“ 電容 cm、Cs、cp、Cfl、Cf2、a、C2 開關元件幻、《、心、如 主動開關^& 二極體令认 12The invention preserves the balance and advantages of the reduced-boost conversion bribe D-type resonant contact, and firstly proposes a single-stage high-power D-class parallel-parallel resonant Wei-light electronic ballast, and the circuit structure is integrated with two sets of step-down conversion! i丨, Π and D resonant converters. The integrated over-combination combines the switch & and the switch core in Figure 2; the switch & and the switch center, and rearranges the inductance ^, the heart 2, the pole body and the recognition position to obtain the single-stage high power factor D of Figure 3. The series-parallel resonant fluorescent lamp hair child device, the integrated circuit only needs a set of control circuit and two active switches 'control circuit to control the ship wave width modulation control mode, Guding the main fine switching frequency And the cycle of responsibility. Since the energy storage inductors of the two sets of step-down converters are responsible for the half cycle of the input power supply, and no current flows at the same time, the actual circuit uses one core and two sets of windings to make the inductor Zp/7 and Z into. The power switching elements && are bidirectional turn-on switches, MOSFETs can be used, and the base-drain diodes can be used as A and 毋's, requiring additional parallel diodes. Therefore, compared with other single-stage high-power fluorescent lamp electronic stability circuit [41-43], this research project proposes a single-stage D-type series-parallel resonance high-power fluorescent lamp electronic ballast circuit. The number of diodes is obviously much reduced, with the reduced diodes and partly the fast diodes. Therefore, the circuit of this research plan will be made more competitive in cost. In addition, the passive filter G and the electric valley C/ in the circuit are used to eliminate the high-frequency current component of the converter, so that the input current is a low-frequency (60Hz) sine wave. In order to confirm the feasibility of the integrated new single-stage high-power D-type series-parallel resonant fluorescent lamp electronic ballast, this patent will use two series of 40W fluorescent lamps as design examples, and the operating principle of 7 200812435 H With the working mode, the Lisbee wave analysis method derives the circuit equation, recognizes the parameters in the road, and makes the two sets of step-down converters be compiled into the discontinuous current conduction type 2'! The series-parallel resonant fluorescent lamp electronic ballast is designed for zero voltage and zero-switching conduction operation to achieve the goal of high power factor, low touch and low switching loss efficiency. 〃 =3 single-stage high-power D-class parallel-parallel resonant fluorescent lamp electronic ballast has a symmetrical circuit structure 'switch & must have the same duty cycle, therefore, must use ^ 冉 pulse see (four) change Control active off 7, & active __ signal as shown in Figure 4, factory (four), F thief is the gate voltage of the switch, its pulse width is equal and complementary, · έ ... is s late (four) 'in 怠The delay time and the internal time are all low. When the emergency time increases, the pulse width decreases, and the delay time cannot be zero to prevent the active switch. In the figure, & is the duty cycle of the heart, & is defined as the ratio of the pulse width to the duty cycle. The circuit structure and control circuit of the female 疋杰 are symmetrical. For the wheeled power supply, the working mode of the positive half cycle and the negative half cycle is similar. The difference is only the conduction component changes. Although the view of the jade, the input AC power will be converted into a DC power supply 匕 / 2, at the same time, the boost converter n does not work; conversely, when the input power supply is half a cycle, the boost converter H II J1 , will input the AC power miscellaneous DC power ^^, and the boost converter I does not work. In order to simplify the analysis, this paper only analyzes the positive half-wave power supply, and ignores the passive filter circuit 4, cw, which is used to filter out the high-frequency components of the converter without affecting the converter action. In order to achieve the purpose of power correction, the step-down converter must operate in a discontinuous current mode. Under this condition, according to the conduction state of the power switching element, the circuit can be divided into five operations in a high frequency period. The mode is shown in Figure 5. Fig. 6 shows the theoretical waveforms of voltage and current in each operation mode, wherein Fig. 6(a) shows the waveform when the input voltage is positive half cycle; Fig. 6(b) shows the waveform when the input voltage is negative half cycle. 8 200812435 Working mode I starts at the moment when the gate signal Γ (4) changes from high potential to low potential, and the time is short-lived, 峨b is low by t, and 2G is not called. _The resonant circuit is electrically mixed, and the resonant power is behind the electric castle. At the closing moment, /, it is a negative value and flows to the diode A. Once the A is turned on, the voltage at both ends is almost zero (·0.7ν). After the input voltage across Zp/, the step-down converter works in DCM 'The inductor current increases linearly from zero, and the speed of the heart increases proportional to the input voltage'. When the sum is /, the sum is greater than zero, the pole Body D/cutoff, enters the working mode light. Second, the working mode 11 (〇 <α <α2): / conduction 'part / ρ flow 込, the rest flows through the resonance circuit, g remains in conduction sorrow ' & the voltage across the two is still equal to the rectified input voltage The heart continues to increase linearly, and the heart gradually increases from negative to positive. After that, & and Λ flow together~ Because (10)^ turns on, the voltage and current are equal to zero. The advantage of zero voltage and zero current switching conduction is small, and the switching loss is small. . When the inter-pole cake turns to a low level, the switch reaches its peak value and enters the fragmentation m. The heart arrives at the working mode ΙΙΙ(ί2 <ί<ί3) ·· Enters the working mode III _, _ (four), Λ is positive value 3 to the second pole material, charging C2, in order to make the converter work DCC (rf/) must not exceed the peak value of the input AC voltage, so that A is reverse biased not to exceed the input power, but flows through A to charge G, and the two ends of the cable are negative & ϋ) ' / Destroy the peak _ start miscellaneous. Because; the scale value is proportional to the input face, y, * this, the heart may fall to zero than in the evening; it may fall earlier than Λ, when ===, enter the working mode 1v-a; the latter, when & When falling to zero, when entering 'Form III, /, is positive and flows through A, the voltage at both ends must be equal to the diode conduction power 200812435 pressure (-0.7V), almost zero, after a short delay time After that, the gate level signal factory changed from low potential to zeta potential. However, 0 is not turned on immediately. When the zero point becomes negative, ^ switch is turned on, like 込, 込 has zero voltage and zero current switching conduction advantages, switching The loss is very high, working mode IV-a (〇 <, <, 4): After the turbulent flow, the heart continues to drop. For the discontinuous current mode of operation, before the gate level signal F (four) goes low, the inductor current The heart is decremented to zero, at which point, it enters the working mode V. , 立, 丄TF nucleotype IV_b (,3 < ^ < (4): In this mode of operation, ^ is zero, is 3 cutoff; Λ is positive and flows through D2, when 厶 passes through zero to become negative,仏Switching on and entering the working mode V. VI. Working mode V(纟4 <〖<ί5): In this working mode, the conduction current 4 flows through the 込, the capacitance Q provides energy to the resonance circuit, when the factory is extinguished by the high When the potential becomes a low potential, 込 is turned off, and the circuit enters the operation mode I of the next high frequency period. Since the sum of the on-times of A and NAND is equal to the level of the switching period, that is, the duty cycle of the operation of &, & Equal to 〇·5, the control-down boost converter operates in a discontinuous current mode, and the switching frequency is kept constant for each input power cycle, the input current can follow the input light waveform and be with her, Can axis high power factor. Therefore, the peak value of the rectifier 1 input cake & will follow the input light waveform, and Figure 7 shows the input current 厶 waveform before the tear wave. ° ' When the voltage-to-time integral of the energy storage inductor is less than zero, the step-down converter operates on the discontinuous current (4). If the boost booster can be operated by the input, it can operate on the discontinuous current. Type, shooting to ensure that reading people _ each - miscellaneous will be able to work in 200812435 in the discontinuous electrical materials pass, therefore, straight Lin Lai ^ ^ / 2 must be greater than the input pressure of the bee. '^ Figure 8 shows the input voltage Vs and the input current 4 waveform. The input current is very close to the sine wave and /, the input voltage is in phase, the ballast efficiency is 9〇%, the power factor is 〇·99, and the total harmonic distortion of the input current It is 8.0%. Η 9 is the inductor current waveform of the two sets of step-down converters. When the input voltage is positive, only the step-down converter has current flowing through. When the input voltage is negative half-wave, there is a drop-boost H Π current. Through, the inductor current is in the whole process. Figure 10 shows the waveform of the lamp voltage and the current of the lamp. The lamp is almost in phase with the arc 2. The lamp is resistive; the peak factor of the lamp current is equal to 1.34. Figure 11 shows that the waveform of the input voltage is at the positive half-wave peak, near the zero point and the negative half-wave peak 2, and the volumetric shape is theoretically derived from the theoretical derivation waveform. Both && start with a negative current flowing through the parallel diode (9) next to the active switch. For example, the active switch has dragon scales at both ends, and the wire shows that the wires _ G and 7 can be switched. The 7F long _ and A waveforms can also be found from the figure. Two: = The pressure conversion H works in the discontinuous current conduction mode, and works in positive and negative half cycles respectively. According to the red, the single-stage high-power D-class parallel-parallel resonant-type lamp electronic device proposed by the present invention has a simple circuit structure, control 4 and a rate of increase than the H single-stage high-fluorescent lamp electronic ballast. With the advantages of low cost. The actual measurement results show that the efficiency of the electronic money circuit of this single-stage high power is as high as _; the number of working phases of the input power is also as high as 0·99, and the total financial distortion of the input current is 8 〇%. [Simple description of the diagram] Figure D Class-parallel resonant converter fluorescent lamp electronic ballast. 11 200812435 The first figure is a two-stage D-class parallel-parallel resonant fluorescent electronic ballast circuit architecture. The third figure is a single-stage high-power D-class parallel-parallel resonant fluorescent electronic ballast. The fourth diagram of the active switch trigger signal symmetrical pulse width modulation. The fifth figure works in modes ΙΙ, ΙΙ, ΙΠ, IV_a, IV_b, V. Sixth theoretical waveform. The seventh figure jp shows the waveform. Figure 8 shows the input voltage 6 and the input current waveform. Figure 9 shows the boost converter converter current /p/ and /p2 waveforms. Figure 10 shows the lamp voltage and lamp current/flrc waveform. Figure 11 ^6, /r, /57 and / magic waveform. Figure 12 shows the 匕&, heart, heart and heart waveforms measured over a long period of time. [Main component symbol description] Filter, wave device f Down-boost converter I, π D-type series-parallel resonant converter Fluorescent lamp electronic ballast inductance A, B, "capacitance cm, Cs, cp, Cfl, Cf2, a, C2 switching element magic, ", heart, such as active switch ^ & diode order to recognize 12